Re: Triggered spark gaps for coils

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-uswest-dot-net>" <jimlux-at-earthlink-dot-net>



Tesla list wrote:
> 
> Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<Gary.Lau-at-compaq-dot-com>
> 
> The trigger circuit will need a 60 Hz zero-crossing detector with a 120 Hz
> output, followed by a variable delay circuit to vary the phase.  I don't
> think you want to trigger at variable voltage levels along the mains
> waveform, as mains-voltage is subject to significant dips (not to mention
> spikes) as your coil draws more or less power.  I'll not be able to
> speculate on exact circuit configurations until I'm able to build and test
> them, several months away at best.

I'll bet one of the standard phase control dimmer circuits will work for
firing the auto coil at a line locked rate.  Just like the ignition
coil/dimmer TC's...